package com.wxg.netty.chat;

import com.wxg.netty.chat.server.SimpleChatServerInitializer;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;

public class SimpleChatServer {

    private int port;

    public SimpleChatServer(int port) {
        this.port = port;
    }

    public void run() throws Exception{
        EventLoopGroup boosGroup = new NioEventLoopGroup(); // (1)
        EventLoopGroup workerGroup = new NioEventLoopGroup();

        try {
            ServerBootstrap b = new ServerBootstrap(); // (2)
            b.group(boosGroup, workerGroup)
                    .channel(NioServerSocketChannel.class) // (3)
                .childHandler(new SimpleChatServerInitializer()) //(4)
                .option(ChannelOption.SO_BACKLOG, 128) // (5)
                .childOption(ChannelOption.SO_KEEPALIVE, true); // (6)

            System.out.println("SimpleChatServer 启动了");

            // 绑定端口，开始接收进来的连接
            ChannelFuture f = b.bind(port).sync(); // (7)

            // 等待服务器 socket 关闭
            // 在这个例子中, 这不会发生, 但你可以优雅地关闭你的服务器
            f.channel().closeFuture().sync();
        } finally {
            workerGroup.shutdownGracefully();
            boosGroup.shutdownGracefully();

            System.out.println("SimpleChatServer 关闭了");
        }
    }

    public static void main(String[] args) throws Exception {
        int port;
        if(args.length > 0){
            port = Integer.parseInt(args[0]);
        }else {
            port = 8080;
        }
        new SimpleChatServer(port).run();
    }
}
